薄板坯连铸连轧生产高强汽车用钢

RAL薄板坯连铸连轧生产AHSS王国栋东北大学轧制技术及连轧自动化国家重点实验室2012.03.06,北京RALPart1:ApplicationsofAHSSRALFlatsteelconsumptioninautoindustryRALThetypicalapplicationofAHSSRALAHSS:propertiesandapplications706020100200400600800100012001400160018002000504030BHMildIFHSIFTWIPTRIPSBTRCPMARTDPCPHSLAC-MnHPFHPFEl(%)TS(MPa)RALAHSS以热带冷的组织控制酸洗连铸薄板坯热连轧新一代TMCP工艺－热轧生产AHSS流程连铸热连轧冷连轧涂镀或退火传统工艺－冷轧生产AHSS流程涂镀或退火酸洗RAL汽车零件使用特点和力学性能RearbumperimpactbeamRearsidememberRoofcrossmembercenterRoofframefrontDashlower(cowlcross)DashupperreinforceRearfloorcrossmemberRoofsiderailRoofsidememberRearpillarCenterpillarDoorimpactbeamSidesillFrontpillarFrontsidememberFrontbumperimpactbeamRALCrushzoneFunction:LongcrushlengthsLongdurationofcrashpulseFrontalimpactEuro-NCAPFrontaloffsetimpact:64kphRAL汽车不同部位的用钢要求：纵向冲撞RALWeight：230～380kg汽车不同部位的用钢要求：白车身（BIW）Function:LongcrushlengthsLongdurationofcrashpulseCrushzoneRALAMtestfor:EnergyabsorptionundercompressiveloadClosed-Top-HatSampletestconditionsRecordsFinalspecimenobservationRALTechnologyforcoldrolledDPsteelsTemperatureRALTechnologyforcoldrolledTRIPsteelTemperatureTemperatureTemperatureTemperatureRALUS-NHTSASideimpact:55.8kphAnti-intrusionFunction:MinimumintrusionHighenergydissipationSideimpactofacarRALAMtestfor:MaximalLoadunder3Pbending.Impactspeed:8m/sKineticenergy:10kJ7001001403075455050480300SupportImpactor200Sampletestconditions:3pointbendingrecordsFinalspecimenobservationDisplacement(mm)Force(kN)YieldforceMaximumforce(ulitmatefailurestress)RALAnti-intrusionFunction:MinimumintrusionHighenergydissipationFunction:anti-intrusionRALDifferentHPFprocessesRALThyssen-Krupp:boronsteelRALMechanicalpropertiesandtransformationbehaviorofboronbearingsteelRALThechangeofm.propertiesofboronsteelduringheatingandquenchingTS(MPa)706020100200400600800100012001400160018002000504030BHMildIFHSIFTWIPTRIPSBTRCPMARTDPCPHSLAC-MnHPFpartHPFEl(%)HPFsteelHeating(1)Transfer(2)Forming(3)Quenchingindies(4)TS(MPa)706020100200400600800100012001400160018002000504030BHMildIFHSIFTWIPTRIPSBTRCPMARTDPCPHSLAC-MnHPFpartHPFEl(%)HPFsteelHeating(1)Transfer(2)Forming(3)Quenchingindies(4)RALWorkpieceonthestampingmoldsRALAnExampleofHPFSteelHPF用钢可以用热轧生产RALApplicationofUSINOR1500PRAL(suspension)汽车不同部位的用钢要求：悬挂件RALSteelWheelsw/TailoredBlankLayoutRALRearSuspensionModuleRALLowerWishboneAssemblyRALUpperWishboneAssemblyRAL强度级别：TS＝500～800MPa厚度：1.2mm~3mm钢种：热轧为主DP（600～800）SF（540～800）悬挂件使用材料RALNANO-HITEN的概念和力学性能RAL开发NANO-HITEN的冶金原理RALNANOHITEN的应用CenterpillarSidememberSuspensionarmSidesillSuspensionCenterpillarSidemember可能生产的汽车零件RAL汽车用材料-性能-成形方法-构件关系706020100200400600800100012001400160018002000504030BHMildIFHSIFTWIPTRIPSBTRCPMARTDPCPHSLAC-MnHPFHPFEl(%)TS(MPa)StampingRollformingHotpressformingHydroformingDP/TR/CP/MSHPFSTEELIF/LCBH/HSSDP/FB/TRTWIPSBTRBSTEEL主导成形方法保险杠加强件结构件内板外板吸收能量抵抗撞击RALPart2:HotRollingofAHSSAbroadRALAHSS钢的生产工艺流程RALRecentTrendsforHotRolledStripAHSS(AdvancedHighStrengthSteel)HSLA(HighStrengthLowAlloy)SteelHighStrength780MPaFormability(HER)ThinGauge1.8mmLowCostProcessSimplificationHighStrength1GPaBendabilityFractureToughnessLowTemp.Toughness250Jat40℃SourResistanceWeldabilityHighCarbonSteelLinePipeSteelRALHotRolledAHSS-RecentTrendsforHotRolledStripHOTROLLEDAHSS(AdvancedHighStrengthSteel)DP,TRIPHighStrength690-1000MPaFormability(HER)Thickness1.0-3.0mmHSLAsteelBoronSteelRAL热轧AHSS生产工艺特点控制要点：终轧温度＋卷取温度＋控制要点：终轧温度＋卷取温度＋冷却路径控制冷却路径控制RALAdvantagesofTSCCCRforproductionofAHSS•Constantandsteadyprocess.Thetemperatureandprofiledimensionarealmostconstantatanypointoftheproductionline---thehomogeneousintheproperties•Inthesoakingprocessthetemperatureishomogeneousinaslab•Thecontrolofshapeandthicknessofthestripiseasy•TheprocessismoresuitableforrollingofthingaugeproductsRALISP/ESP无头热轧技术唐山国丰钢铁有限公司2010-08-10RALISP/ESPISP/ESP无头热轧技术无头热轧技术RAL位于意大利克雷蒙纳市AcciaieriaArvediESP生产线•全长190m•铸坯厚度100mm，拉速3m/min•宽度1600mm，最小厚度0.8mm•能耗降低45％•保温炉，维持1100－1200℃RALESP的热轧产品及后续冷轧产品牌号厚度规格mmDD120.80-10.00S235JR0.85-12.00S315MC1.00-12.00S355MC1.20-12.00S420MC1.20-10.00S700MC1.80-8.00DP6001.20-5.00DP10001.50-5.00牌号厚度规格mmDD120.15-2.00S235JR0.25-2.00S315MC0.30-2.00S355MC0.35-2.00S420MC0.35-2.00S700MC0.60-2.00DP6000.35-2.00DP10000.45-2.00RALISP线工艺布置和主要产品规格连铸坯宽度/mm结晶器厚度/mm连铸坯厚度/mm最大拉速/m/min流速/T/min125075557.03.7开始生产时间：19922009年产量：100万吨2010年产量：预计100万吨产品厚度：min.1.0mm产品宽度：max.1250mm连铸平台薄板坯连铸机大压下轧机摆动式飞剪电感应加热器克罗蒙那加热炉飞剪精轧机层流冷却地下卷取机120T电炉55mm:10m/minmax.12-19mm:0.2-0.5m/s1.0-12mm75mm:7.0m/minmax.12-19mm:～1.0m/s1.0-12mm:12.5m/smax175mISP工艺布置规格mm200520061.00-1.2514%12%1.25-1.6025%24%1.60–2.0515%19%2.05以上46%45%RALProductsmixofaISPproductionline1低碳钢油桶、容器板、货柜、锅炉板、扩展容器板、隔板材料、钢家具、热镀锌板、电镀锌板2建筑用钢再轧板、空寂压缩机容器、气体容器管、锅炉板、建筑表面板3碳素钢刹车片、洗衣机板、刀片、链条4高强度钢汽车喇叭弹簧、座位、滑动板、车轮盘、门铰链、引导轮、安全带、抗冲击板、连杆、大梁5含硼热处理用钢HPF用钢6耐腐蚀钢防护栏杆、容器、焊接桥梁7多相钢车轮、弹簧、底盘、建筑用钢、汽车部件、座位RALISP生产的高强热轧双相钢板ISP生产的3.0mmDP600轮毂厚度mmYSMPaUTSMPaYS/UTSEl%铁素体%马氏体%贝氏体%珠光体%铁素体晶粒尺寸um3.03566150.583385150052.03536300.562586140041.84046400.63228317（马氏体+贝氏体）04牌号化学成分（wt,%)CMnCrDP6000.05～0.100.90～1.700.03～0.35DP600微观组织3.0mm2.0mm1.8mmRALISP生产的高强热轧钢板（YS700MPa）牌号化学成分（wt,%)CMnNbTiBS700MC0.04～0.071.0～2.00.